If you’ve encountered the Windows 11 Kernel Security Check Failure (often shown as a blue screen error or BSOD), you’re not alone. This error can disrupt your workflow and leave you scratching your head. Don’t worry—this comprehensive guide will walk you through how to diagnose and fix this issue, so your PC runs smoothly again.
What is the Kernel Security Check Failure Error in Windows 11?
The Kernel Security Check Failure occurs when Windows detects data corruption or integrity violations in the memory, disk, or system files. It’s often linked to outdated drivers, incompatible software, or hardware issues. When triggered, Windows will stop everything to protect your system and display the blue screen with the error code 0x00000139.
Common Causes of Kernel Security Check Failure
- Outdated or corrupt device drivers
- Memory (RAM) errors or failures
- Corrupted system files or updates
- Disk errors or bad sectors
- Incompatible software or recent hardware changes
How to Fix Kernel Security Check Failure Error in Windows 11
1. Restart Your Computer
Start with the basics — sometimes, a simple restart resolves temporary glitches.
2. Update Windows and Drivers
- Press Windows + I to open Settings.
- Go to Windows Update and click Check for updates.
- Install all pending updates.
- Open Device Manager by right-clicking the Start button.
- Expand each category and right-click to Update driver, especially for graphics cards, network adapters, and storage controllers.
3. Run Memory Diagnostic Tool
Faulty RAM can trigger this error.
- Press Windows + R, type mdsched.exe, and hit Enter.
- Choose Restart now and check for problems.
- The PC will restart and scan your memory for errors — follow any on-screen instructions after the scan.
4. Run System File Checker (SFC) and DISM
Corrupted system files need repair.
- Open Command Prompt as Administrator (Search for CMD, right-click > Run as admin).
- Type
sfc /scannowand press Enter. - Wait until it finishes scanning and repairing.
If issues persist, run the DISM tool:
-
In the same terminal, enter:
DISM /Online /Cleanup-Image /RestoreHealth
-
Press Enter and wait for completion.
-
Restart your PC.
5. Check Disk for Errors
-
Open Command Prompt as Administrator.
-
Type:
chkdsk /f /r
-
Press Enter and schedule the check on next restart.
-
Restart your PC to scan and fix disk errors.
6. Uninstall Problematic Software or Drivers
If the error started after a new install:
- Go to Settings > Apps > Installed apps.
- Find and uninstall recent programs.
- If it’s driver-related, uninstall via Device Manager, then reinstall the latest drivers.
7. Boot into Safe Mode and Restore System
- Press Windows + I > System > Recovery > under Advanced startup, click Restart now.
- After reboot, go to Troubleshoot > Advanced options > Startup Settings > Restart.
- Press 4 for Safe Mode.
If the system works fine in Safe Mode, it’s likely a driver or software conflict.
- Try performing a System Restore to a point before the issue appeared:
- Search Create a restore point.
- Click System Restore and choose a relevant restore point.
8. Update BIOS
Outdated BIOS can cause compatibility issues:
- Check your motherboard or PC manufacturer’s website.
- Follow instructions carefully to update your BIOS.
Final Tips
- Keep your Windows and drivers regularly updated.
- Use trustworthy antivirus programs to prevent corruption.
- Avoid installing unknown or incompatible software.
- Back up important data to avoid loss during troubleshooting.
Conclusion
Encountering the Kernel Security Check Failure on Windows 11 can be frustrating, but with patience and methodical troubleshooting, you can resolve it. Start with updates and scans, then progress to deeper fixes like driver reinstallation or system restore. If all else fails, professional help might be needed.
Have questions or want us to cover more Windows 11 tips? Feel free to leave a comment below. Stay safe and keep your PC running smoothly!
Keywords: Windows 11 Kernel Security Check Failure, Windows 11 BSOD, Kernel Security Check failure fix, Windows 11 blue screen error, fix kernel security check failure Windows 11, Windows 11 troubleshooting, Windows 11 memory diagnostic, update Windows 11 drivers.
